Materials Design for Molecular Recognition Devices using Nano-space between tow Oxide Semiconductor Crystals

利用两束氧化物半导体晶体之间的纳米空间进行分子识别器件的材料设计

• 批准号: 13650878
• 负责人: NAKAMURA Yoshinobu
• 金额: $ 2.24万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650878/
• 关键词: STM; copper oxide; zinc oxide; enzyme; nano-space; alcohol; molecular recognition; チューニング; ヘテロ界面; 超近接場; ZnO; 分子認識; 強相関係; センサー; 非線形特性; CuO; トンネル電流

By using the STM system, structurally well-controlled CuO-ZnO "open junction" (tunnel junction) is prepared and the effect of the crystal axis orientation relationship at the junction interface on its alcohol sensing properties is discussed. The CuO-ZnO tunnel junctions have atmosphere sensitive electrical properties even at room temperature. When a CuO tip and Zn-terminated polar surface of ZnO (ZnO (Zn-face)) are chosen for making the tunnel junction, the obtained CuO-ZnO(Zn-face) junction shows highly rectifying characters, where CuO-ZnO(O-face) shows not so good rectifying character. Only the CuO-ZnO(Zn-face) tunnel junction shows a pronounced ethanol sensing characteristics. The catalytic active surface of ZnO(Zn-face) would play an important role for the alcohol sensing characteristics of the CuO-ZnO tunnel junction. Through the current studies on the electrical characterization of the tunnel junction between CuO and ZnO, it is appeared that a structurally well-controlled "open interface" having nano-space between two crystals will be appropriate for the chemical sensor elements, which have an ability of molecular recognition.

利用STM系统制备了结构可控的CuO-ZnO“开结”（隧道结），并讨论了结界面处晶体轴向关系对其醇感性能的影响。即使在室温下，CuO-ZnO隧道结也具有大气敏感的电性能。当选择CuO端部和ZnO端锌极面（ZnO (Zn-face)）制作隧道结时，得到的CuO-ZnO（Zn-face）结具有很强的整流特性，而CuO-ZnO（O-face）结的整流特性不太好。只有CuO-ZnO（zn -面）隧道结表现出明显的乙醇传感特性。ZnO的催化活性表面（Zn-face）对CuO-ZnO隧道结的醇感特性起着重要的作用。通过对CuO和ZnO之间隧道结电学特性的研究表明，两晶体之间具有纳米空间的结构可控的“开放界面”将适合于具有分子识别能力的化学传感器元件。

项目成果

中村吉伸, 高木英典: "有機物質の電場効果ドーピング"電気化学および工業物理化学. 70(4). 283-287 (2002)

Yoshinobu Nakamura、Hidenori Takagi：“有机材料的场效应掺杂”电化学和工业物理化学 70(4) (2002)。